These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Relationship of amyloid-β burden with age-at-onset in Alzheimer disease.
    Author: Choo IH, Lee DY, Kim JW, Seo EH, Lee DS, Kim YK, Kim SG, Park SY, Woo JI, Yoon EJ.
    Journal: Am J Geriatr Psychiatry; 2011 Jul; 19(7):627-34. PubMed ID: 21709608.
    Abstract:
    OBJECTIVE: To investigate the relationship between in vivo brain amyloid-beta (Aβ) burden, measured by C-labeled Pittsburgh Compound B (C-PiB) retention, and age-at-onset in patients with Alzheimer disease (AD). DESIGN: Cross-sectional study. SETTING: University Dementia Clinic. PARTICIPANTS: Twenty-two AD patients including 11 early-onset AD (EOAD: onset <65 years) and 11 late-onset AD (LOAD: onset ≥65years) cases with matched dementia severity, duration of illness, and apolipoprotein E ε4 allele number. INTERVENTION: C-PiB positron emission tomography scans. MEASUREMENTS: Both region of interest and voxel-based analyses were performed to compare C-PiB retention between EOAD and LOAD groups, and to test linear relationship between age-at-onset and C-PiB retention. RESULTS: Both region of interest (ROI) and voxel-based analyses revealed that EOAD patients had significantly higher C-PIB retentions than LOAD patients in diffuse brain regions including frontal, lateral parietal, lateral temporal, and occipital cortex, and basal ganglia. Subgroup analyses showed that negative correlation between age-at-onset and C-PiB retention was significant in LOAD but not in EOAD. CONCLUSIONS: Our finding of a heavier Aβ burden in the brain of living EOAD patients than LOAD patients is in agreement with those from postmortem studies. The inverse relationship between age-at-onset and Aβ burden is possibly associated with aging-related decrease of brain or cognitive reserve and with aging-related increase of brain vulnerability.
    [Abstract] [Full Text] [Related] [New Search]